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Tutorat Associatif Toulousain

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3francssixou

By 3francssixou
in UE1 - Chimie

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3francssixou tic tat

3francssixou

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Bonjour, 

 

Quelqu'un saurait m'expliquer la D ? Elle est compté fausse et la correction dit que BeF2 a 2 orbitales p vacantes. Je ne comprend pas pourquoi..

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Mathilde14 Morula compactée

Mathilde14

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Quand tu écris la configuration électronique de Be tu as : 1s2 2s2 mais pour former la molécule BeF2 le Be subit une excitation et devient 2s1 2p1 donc une orbitale p est occupée par un électron et les deux autres orbitales p sont vacantes. 

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